package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.OrderService;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFAnchor;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import static java.lang.System.in;

@Service
public class ReportServicelmpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 统计营业额
     *
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合存放从begin到end的时间集合
        List<LocalDate> dateList = new ArrayList();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnOverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //根据日期查询营业额，需要时分秒具体时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //根据数据库进行查询
            Map map = new HashMap();
            map.put("beginTime", beginTime);
            map.put("endTime", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 :turnover;
            turnOverList.add(turnover);
        }
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnOverList, ","))
                .build();
    }

    /**
     * 统计用户数量
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        //当前集合存放从begin到end的时间集合
        List<LocalDate> dateList = new ArrayList();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //存放总的用户数量
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("endTime", endTime);
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            map.put("beginTime", beginTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);

        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /**
     * 指定时间内的订单统计
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //当前集合存放从begin到end的时间集合
        List<LocalDate> dateList = new ArrayList();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderList = new ArrayList<>();
        List<Integer> validOrderList = new ArrayList<>();

        //遍历dataList集合，查询有效订单数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderList.add(orderCount);
            validOrderList.add(validOrderCount);
        }

        Integer totalOrderCount = orderList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderList.stream().reduce(Integer::sum).get();

        Double orderCompleteRate = 0.0;
        if (totalOrderCount != 0){
            orderCompleteRate =validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderList,","))
                .validOrderCountList(StringUtils.join(validOrderList,","))
                .orderCompletionRate(orderCompleteRate)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .build();
    }

    /**
     * 统计指定时间内的销量前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> number = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(number, ",");

        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1、查询数据库，获取营业数据
            //查询概览数据
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        BusinessDataVO businessData = workspaceService.getBusinessData(beginTime, endTime);


        //2、通过POI将数据写入excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //获取sheet1
            XSSFSheet sheet1 = excel.getSheet("Sheet1");
            //直接写入数据
            sheet1.getRow(1).getCell(1).setCellValue("时间"+beginTime+"至"+endTime);
            //获取第4行
            XSSFRow row4 = sheet1.getRow(3);
            row4.getCell(2).setCellValue(businessData.getTurnover());
            row4.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row4.getCell(6).setCellValue(businessData.getNewUsers());
            //获得第5行
            XSSFRow row5 = sheet1.getRow(4);
            row5.getCell(2).setCellValue(businessData.getValidOrderCount());
            row5.getCell(4).setCellValue(businessData.getUnitPrice());

            //填充明细数据
            for (int i = 0;i<30;i++){
                LocalDate date = begin.plusDays(i);
                //查询某一天的营业数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //
                XSSFRow row = sheet1.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate().shortValue());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }
            //3、通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status) {

        Map map = new HashMap();

        map.put("beginTime", begin);
        map.put("endTime", end);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }
}
